<div class="composition-layout">

    <div style="height:60%;border-bottom: 1px solid #cccccc;">
        <div style="float:left;width:48%;border-right: 1px solid #cccccc;height:100%;">1</div>
        <div style="float:left;height:100%;">2</div>
    </div>
    <div style="height:35%;">3</div>
</div>

